Network Analyser VNA Kit with Arduino Mega
Build Your Own Vector Network Analyser (VNA) with Arduino Mega
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
From characterising antennas to filtering circuits, a vector network analyser is an essential bench instrument — but commercial units cost lakhs. This kit lets you build a working VNA that measures S11 reflection coefficient and plots impedance magnitude/phase over 1 kHz to 40 kHz, using an Arduino Mega, AD9833 DDS, ADS1115 ADC, and a bright TFT display. You'll learn by constructing the entire signal chain, directional bridge, and performing calibration yourself.
What You'll Build
A portable, self-contained vector network analyser that displays impedance (Z), reflection coefficient, and SWR on a colour TFT screen. The directional bridge isolates the reflected signal, the dual ADS1115 captures it precisely via an I2C multiplexer, and the Arduino sweeps the AD9833 across the frequency range. You'll have a real lab instrument ready for antenna tuning, filter characterisation, or impedance matching tasks.
What You'll Learn
- How a directional coupler separates forward and reflected waves for S11 measurement
- Precision ADC sampling and I2C multiplexing with ADS1115 and TCA9548A
- AD9833 DDS programming to generate swept sine waves across 1–40 kHz
- Real-time TFT plotting: impedance magnitude, phase, and Smith chart basics
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | x1 |
| AD9833 Signal Gen | x1 |
| ADS1115 ADC | x2 |
| TCA9548A I2C Mux | x1 |
| LM358 Op-Amp | x4 |
| 1.8in TFT ST7735 | x1 |
| 50Ω Directional Bridge | x1 |
| 100kΩ Resistors | x10 |
| 100nF Caps | x15 |
| PCB Prototype Board | x4 |
| 9V Battery Snap | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is built for B.Tech ECE and EEE students exploring RF measurements for final-year projects, Smart India Hackathon teams needing a low-cost VNA for antenna prototyping, and advanced hobbyists who want a bench-grade instrument without the lakh-rupee price tag. If you've completed a basic Arduino course and understand frequency response, this is your next step.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
The AI companion on your phone (QR code inside box) steps through calibration and debugging; you can also message us on WhatsApp for real-time help.
Does this VNA measure S21 (transmission)?
This kit is designed for S11 reflection measurement only; it uses a directional bridge. For transmission, you'd need a second bridge and RF switch.
What frequency range does it cover and how accurate is it?
The AD9833 generates 1 kHz to 40 kHz (usable up to about 100 kHz with roll-off). Accuracy depends on your calibration, but with a known load you can achieve approximately 5% impedance error.
Do I need an RF-shielded enclosure?
For best results, place the bridge and op-amp circuits on a ground plane; the kit includes prototyping boards to solder your own shielding if needed.
AD9833 sweeps into DUT. ADS1115 measures S11 reflection. TFT plots impedance from 1kHz to 40kHz.
What's in this kit
- Arduino Mega 2560
- AD9833 Signal Gen
- ADS1115 ADC x2
- TCA9548A I2C Mux
- LM358 Op-Amp x4
- 1.8in TFT ST7735
- 50Ω Directional Bridge
- 100kΩ Resistors x10
- 100nF Caps x15
- PCB Prototype Board x4
- 9V Battery Snap
- Soldering Iron
- Solder Wire
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items